Johnny Galecki

Acting • 1975-04-30 • Bree, Belgium

Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter in The Big Bang Theory.

Known For

7.9

The Big Bang Theory

2007

7.2

National Lampoon's Christmas Vacation

1989

7.0

In Time

2011

7.4

Entourage

2004

5.0

Rings

2017

6.8

Roseanne

1988

Fan Club

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From Nerdspin

Filmography

2025
I'm Chevy Chase and You're NotFilm
Self
★ 6.6
2020
Stars in the HouseTV
Self • 1 episodes
2020
The Little Dog LaughedFilm
Alex
2019
A Dog's JourneyFilm
Henry Montgomery
★ 8.1
2019
Unraveling the Mystery: A Big Bang FarewellFilm
Self - Host
2018
The ConnersTV
David Healy • 4 episodes
★ 6.9
2018
The CleanseFilm
Paul Berger
★ 5.0
2018
SciJinksTV
Self - Host • 8 episodes
★ 7.0
2017
RingsFilm
Gabriel
★ 5.0
2016
Must See TV: An All Star Tribute to James BurrowsFilm
Self
★ 4.0
2015
The Late Show with Stephen ColbertTV
Self - Guest • 1 episodes
★ 6.1
2015
Lip Sync BattleTV
Self • 1 episodes
★ 6.4
2013
CBGBFilm
Terry Ork
★ 6.4
2011
In TimeFilm
Borel
★ 7.0
2010
ConanTV
Self • 1 episodes
★ 7.2
2010
ConanTV
Self - Guest • 1 episodes
★ 7.2
2010
The TalkTV
Self • 1 episodes
★ 3.0
2009
Table for ThreeFilm
Ted
★ 4.7
2008
HancockFilm
Jeremy
★ 6.4
2007
The Big Bang TheoryTV
Leonard Hofstadter • 279 episodes
★ 7.9
2007
Boulevard of Broken DreamsTV
Self (archive footage) • 1 episodes
★ 3.0
2005
American Dad!TV
Arnie (voice) • 1 episodes
★ 7.0
2005
The Late Late Show with Craig FergusonTV
Self • 1 episodes
★ 6.9
2005
My Name Is EarlTV
Scott • 1 episodes
★ 7.6
2005
Happy EndingsFilm
Miles (uncredited)
★ 5.6
2004
EntourageTV
Johnny Galecki • 3 episodes
★ 7.4
2004
ChrystalFilm
Barry
★ 5.6
2004
LAXTV
Leland Pressman • 1 episodes
★ 7.0
2003
The Ellen DeGeneres ShowTV
Self • 1 episodes
★ 5.5
2003
Hope & FaithTV
Jay • 3 episodes
★ 5.4
2003
BookiesFilm
Jude
★ 6.3
2001
Vanilla SkyFilm
Peter Brown
★ 6.8
2001
Morgan's FerryFilm
Darcy
★ 6.1
2000
BounceFilm
Seth
★ 5.8
2000
Playing Mona LisaFilm
Arthur
★ 5.7
1999
Family GuyTV
Leonard Hofstadter (voice) • 1 episodes
★ 7.4
1999
Batman BeyondTV
Knux (voice) • 1 episodes
★ 8.2
1999
The Norm ShowTV
Dale Stackhouse • 2 episodes
★ 7.3
1998
The Opposite of SexFilm
Jason Bock
★ 6.2
1997
I Know What You Did Last SummerFilm
Max Neurick
★ 6.0
1997
BeanFilm
Stingo Wheelie
★ 6.5
1997
Suicide KingsFilm
Ira Reder
★ 6.6
1996
Murder at My DoorFilm
Teddy McNair
★ 3.7
1994
Without ConsentFilm
Marty
★ 7.2
1993
Sudden FuryFilm
Daniel Hannigan
★ 5.0
1992
BillyTV
David MacGregor • 13 episodes
★ 7.0
1991
Backfield in MotionFilm
Tim Seavers
★ 5.6
1991
Civil WarsTV
Greg Stolbach • 1 episodes
★ 4.5
1990
BlossomTV
Jason • 1 episodes
★ 6.2
1990
In Defense of a Married ManFilm
Eric
★ 4.7
1990
Blind FaithTV
John Marshall • 2 episodes
★ 6.4
1990
American DreamerTV
Danny Nash • 17 episodes
★ 5.3
1989
National Lampoon's Christmas VacationFilm
Rusty Griswold
★ 7.2
1989
PrancerFilm
Billy Quinn
★ 6.2
1989
HardballTV
★ 7.0
1988
RoseanneTV
David Healy • 92 episodes
★ 6.8
1988
A Night in the Life of Jimmy ReardonFilm
Toby Reardon
★ 5.0
1987
Murder OrdainedFilm
Doug Rule
★ 5.0
1981
Entertainment TonightTV
Self • 2 episodes
★ 4.3
1975
People's Choice AwardsTV
Self - Presenter • 1 episodes
★ 8.2